While I personally prefer to keep things original I also appreciate creative thinking outside the box and agree that your Super J looks striking.
I do wonder if your power nozzle, a Model PN-2, is original to the tank? The early Model 1401/Super Js--sold in late 1975 and early 1976--did, in fact, come equipped with PN-2s. I'm just not sure if they would have included the 50th Jubilee decal. What is the serial id of your cleaner (2 letters with 5 digits in between--found on the stabilizer)? I believe all those of the Super Js had a 'K' prefix but am unsure of what the suffix was of the first production line. You may very well have one of the early ones.
For those who may be unfamiliar with the aluminum-hooded Electrolux power nozzles here is a quick run-down beginning with the PN-2's debut in 1972 and concluding the similar PN-4s. The PN-2s and PN-4s can most quickly be recognized by the plug on top of the hood (PN-2s) versus the plug on back of the hood (PN-4s). **Documentation for PN-3s is lacking, but one of the Electrolux collectors has determined that the model exists (stated on another Vacuumland thread); others claim that the power nozzles made for the Model CBs from 1972-1976 were modeled PN-2 along with their 2-wire counterparts. As with most Electrolux data dates are approximate due to inability to substantiate with the company's records (many believe that the documents were discarded when the corporate offices were relocated, but Aerus only claims that the files are not easily accessible and therefore declines to disclose information that could be gleaned from them).
1972-1974: PN-2 (polished aluminum) with jade elbow, and teal wand sheath and cord
made for: Model 1205 and teal Model L
1972-1974: PN-3 (polished aluminum) with jade elbow, and teal wand sheath and cord (3-wire)
made for: teal Model CB
1974-1975: PN-2 (polished aluminum) with jade elbow, and ivory wand sheath and cord; featuring the "50th Jubilee" decal which matched the ones on the Model 1205/Golden Jubilees
revised for: Model 1205/Golden J and gold Model L
1974-1975: PN-3 (polished aluminum) with jade elbow, and ivory wand sheath and cord (3-wire)
revised for: gold Model CB
1975-1976: PN-2 (polished aluminum) with ivory elbow, wand sheath, and cord
revised for: Model 1401/Super J and gold Model L
1975-1978: PN-3 (polished aluminum) with ivory elbow, wand sheath, and cord (3-wire)
revised for: gold Model CB
1976-1978: PN-4 (polished aluminum) with ivory elbow, wand sheath, and cord (no decal)
made for: Model 1401/Super J and gold Model L
1978: PN-4 (gold-painted aluminum) with ivory elbow, wand sheath, and cord
revised for: Model 1401/Super J and gold Model L
1978-1981: PN-4 (brown-painted aluminum) with ivory elbow, wand sheath, and cord
revised for: Model 1401 and 1401-B/Olympia One and brown Model 1453/Deluxe Special
1978-1982: PN-4C (brown-painted aluminum) with ivory elbow, wand sheath, and cord (3-wire)
revised for: brown Model CB
1981-1982: PN-4A (brown-painted aluminum) with ivory elbow, wand sheath, and cord
made for: Model 1401-B and 1505/Olympia One and brown Model 1453/Deluxe Special
1982-1983: PN-4A (gray-painted aluminum) with gray elbow, wand sheath, and cord
revised for: Model 1505/Silverado and gray Model 1453/Deluxe Special
1982-1983: PN-4C (gray-painted aluminum) with gray elbow, wand sheath, and cord (3-wire)
revised for: gray Model CB
1983-1984: PN-4B (gray-painted aluminum) with gray elbow, wand sheath, and cord
made for: Model 1505/Silverado and gray Model 1453/Deluxe Special
All other Electrolux Corporation (later Electrolux LLC) and Aerus LLC power nozzle hoods--previously and afterward--have been made of plastic with the exception of the first power nozzle, Model N137W, for the Lux Guardian Platinum which was trimmed with a stainless steel plate.